CN114308736B - Capacitor product surge current performance test method and test equipment - Google Patents
Capacitor product surge current performance test method and test equipment Download PDFInfo
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- CN114308736B CN114308736B CN202111638704.8A CN202111638704A CN114308736B CN 114308736 B CN114308736 B CN 114308736B CN 202111638704 A CN202111638704 A CN 202111638704A CN 114308736 B CN114308736 B CN 114308736B
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The embodiment of the invention provides a capacitor product surge current performance test method and test equipment, and relates to the field of capacitor products. The capacitor product surge current performance test method comprises the steps of obtaining a first signal representing maximum current; acquiring a second signal representing real-time current after charging for a first preset time period; obtaining a third signal indicative of a maximum voltage; the first signal, the second signal and the third signal are signals monitored by the oscilloscope in the process of applying surge current to the capacitor product; if at least one of the following conditions is not met, judging the capacitor product as a defective surge current product; if all the following conditions are met, judging the capacitor product as a good surge current product; the conditions include a maximum current greater than a preset maximum current, a real-time current less than a preset real-time current, and a maximum voltage greater than a preset maximum voltage. The capacitor product surge current performance testing method can test and screen out capacitor products with performance which does not reach the standard according to the judging conditions.
Description
Technical Field
The invention relates to the field of capacitor products, in particular to a capacitor product surge current performance test method and test equipment.
Background
The capacitor products need to be subjected to performance detection before being circulated out, and the detection method in the prior art can only detect capacitor products with performance exceeding the standard, but cannot detect capacitor products with performance not reaching the standard.
Disclosure of Invention
The invention provides a capacitor product surge current performance test method and test equipment, which can detect capacitor products with performance exceeding the standard and capacitor products with performance not reaching the standard.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides a capacitor product surge current performance test method, which comprises the following steps:
obtaining a first signal representative of a maximum current;
acquiring a second signal representing real-time current after charging for a first preset time period;
obtaining a third signal indicative of a maximum voltage;
judging whether the capacitor product is good in surge current or not according to the first signal, the second signal and the third signal;
wherein the first signal, the second signal, and the third signal are signals monitored by an oscilloscope during the application of an inrush current to the capacitor product;
if at least one of the following conditions is not met, judging that the capacitor product is a defective surge current product;
if all the following conditions are met, judging the capacitor product as a good surge current product;
wherein the conditions include:
the maximum current is greater than a preset maximum current;
the real-time current is smaller than a preset real-time current;
the maximum voltage is greater than a preset maximum voltage.
Optionally, after the step of determining that the capacitor product is a defective product of the surge current, the method for testing the surge current performance of the capacitor product further includes:
outputting a first screening signal representing screening out the surge current defective products;
and the control clamp screens out the surge current defective products.
Optionally, the circuit for controlling the application of the surge current to the capacitor product employs an IGBT module to implement switching of the circuit.
Optionally, after the step of determining that the capacitor product is a good product of the surge current, the method for testing the surge current performance of the capacitor product further includes:
and after the good surge current product is continuously charged for a second preset time period, the circuit is disconnected so as to perform a holding voltage test.
Optionally, after the circuit is disconnected after the good surge current product is continuously charged for a second preset period of time to perform the step of testing the holding voltage, the method for testing the surge current performance of the capacitor product further includes:
and the surge current good products are automatically discharged.
Optionally, after the automatic discharging step is performed on the good surge current product, the method for testing the surge current performance of the capacitor product further includes:
and charging the surge current good products.
Optionally, after the step of charging the good inrush current product, the method for testing the inrush current performance of the capacitor product further includes:
and carrying out leakage current test on the surge current good products, and automatically discharging after the test is completed.
Optionally, after the step of testing the leakage current of the good inrush current product, the method for testing the inrush current performance of the capacitor product further includes:
and carrying out capacity, loss, equivalent series resistance and bottom bulge test on the surge current good product, and calculating the capacity change rate before and after the surge current test.
Optionally, the step of testing the capacity, the loss, the equivalent series resistance and the bottom bulge of the good product of the surge current, and after calculating the capacity change rate before and after the surge current test, the method for testing the surge current performance of the capacitor product further comprises:
outputting a collection signal representing collection of the good capacitor products;
and the control clamp collects the good products of the capacitor.
The embodiment of the invention also provides test equipment, which is applied to the surge current performance test method of the capacitor product;
wherein the test equipment is used for testing the capacitor products with rated voltages of 500V and below.
The capacitor product surge current performance testing method provided by the embodiment of the invention has the beneficial effects that:
the capacitor product surge current performance test method comprises the steps of obtaining a first signal representing maximum current; acquiring a second signal representing real-time current after charging for a first preset time period; obtaining a third signal indicative of a maximum voltage; judging whether the capacitor product is good in surge current or not according to the first signal, the second signal and the third signal; the first signal, the second signal and the third signal are signals monitored by the oscilloscope in the process of applying surge current to the capacitor product; if at least one of the following conditions is not met, judging the capacitor product as a defective surge current product; if all the following conditions are met, judging the capacitor product as a good surge current product; wherein the conditions include: the maximum current is greater than a preset maximum current; the real-time current is smaller than the preset real-time current; the maximum voltage is greater than a preset maximum voltage. The capacitor product surge current performance testing method can judge and screen out the capacitor products with the performance not up to standard according to the judging conditions, and avoid the circulation of the capacitor products with the performance not up to standard.
The testing equipment is applied to the capacitor product surge current performance testing method, and can be used for carrying out capacitor product surge current performance testing and judging and screening out capacitor products with performance not up to standard, so that the capacitor products not up to standard are prevented from circulating.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for testing surge current performance of a capacitor product according to the present embodiment.
Icon: 1-a feeding vibration disc and a horizontal conveying track; a 2-transition zone; 3-returning the chain; 4-a first detection bit; 5-a first discharge position; 6-a second detection bit; 7-a first charging zone; 8-a third detection bit; 9-a second discharge position; 10-a second charging zone; 11-fourth detection bits; 12-a discharge region; 13-fifth detection bits; 14-a good product collecting box; 15-third discharge position.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The capacitor products need to be subjected to performance detection before being circulated out, and the detection method in the prior art can only detect capacitor products with performance exceeding the standard, but cannot detect capacitor products with performance not reaching the standard.
Referring to fig. 1, the present embodiment provides a method and an apparatus for testing the surge current performance of a capacitor product, where the apparatus is used to test capacitor products with rated voltages of 500V and below 500V, and the method for testing the surge current performance of a capacitor product can effectively improve the above-mentioned technical problems, and not only can detect capacitor products with performance exceeding the standard, but also can detect capacitor products with performance not reaching the standard.
The method for testing the surge current performance of the capacitor product comprises the following steps:
s1: and the control clamp conveys the capacitor product to the first detection position 4 to carry out open circuit and short circuit detection, judges whether the capacitor product is an open circuit and short circuit defective product, outputs a third screening signal representing screening the open circuit and short circuit defective product, and controls the clamp to screen the open circuit and short circuit defective product.
Specifically, the control clamp conveys the open-circuit defective products and the short-circuit defective products to the first discharge position 5 to screen out the open-circuit defective products and the short-circuit defective products.
S2: the control clamp conveys the capacitor product with the open circuit and short circuit detection to a second detection position 6, and a first signal representing the maximum current is obtained; acquiring a second signal representing real-time current after charging for a first preset time period; obtaining a third signal indicative of a maximum voltage; judging whether the capacitor product is good in surge current or not according to the first signal, the second signal and the third signal;
wherein the first signal, the second signal, and the third signal are signals monitored by an oscilloscope during the application of an inrush current to the capacitor product.
In this embodiment, the first preset duration may be adjusted according to the performance parameter of the capacitor product.
If at least one of the following conditions is not met, judging the capacitor product as a defective surge current product, and if all the following conditions are met, judging the capacitor product as a defective surge current product.
Wherein the conditions include: the maximum current is greater than a preset maximum current, the real-time current is less than a preset real-time current, and the maximum voltage is greater than a preset maximum voltage.
In this embodiment, there are seven cases that satisfy the condition that the capacitor product is a defective product of surge current, specifically:
1. the maximum current is smaller than the preset maximum current, the real-time current is larger than the preset real-time current, and the maximum voltage is smaller than the preset maximum voltage;
2. the maximum current is less than the preset maximum current, the real-time current is greater than the preset real-time current, and the maximum voltage is greater than the preset maximum voltage;
3. the maximum current is less than the preset maximum current, the real-time current is less than the preset real-time current, and the maximum voltage is greater than the preset maximum voltage;
4. the maximum current is smaller than the preset maximum current, the real-time current is smaller than the preset real-time current, and the maximum voltage is smaller than the preset maximum voltage;
5. the maximum current is greater than the preset maximum current, the real-time current is greater than the preset real-time current, and the maximum voltage is less than the preset maximum voltage;
6. the maximum current is greater than the preset maximum current, the real-time current is greater than the preset real-time current, and the maximum voltage is greater than the preset maximum voltage;
7. the maximum current is greater than a preset maximum current, the real-time current is less than a preset real-time current, and the maximum voltage is less than a preset maximum voltage.
In this embodiment, before the surge current is applied to the capacitor product, the oscilloscope is controlled to monitor the current and the voltage of the capacitor product in advance, and since the charging time of the small-capacity capacitor product is very short, the oscilloscope is controlled to monitor the current and the voltage of the capacitor product in advance, so that the oscilloscope can be ensured to capture the maximum current and the maximum voltage of the large-capacity capacitor in the process of being applied with the surge current and the real-time current value after being charged for a first preset time period, and the oscilloscope can be ensured to capture the maximum current and the maximum voltage of the small-capacity capacitor product in the process of being applied with the surge current and the real-time current value after being charged for the first preset time period.
The capacitor product is subjected to multiple charge and discharge cycles in the process of being applied with surge current, the oscilloscope monitors the maximum current of the capacitor product in each charge process, the maximum voltage of the capacitor product in each charge process and the real-time current value after the charging in each charge process is carried out for a first preset time period, a first signal representing the maximum current of the capacitor product in each charge process and a second signal representing the real-time current of the capacitor product after the charging in each charge process is carried out for the first preset time period are obtained, the voltage signal comprises a third signal representing the maximum voltage of the capacitor product in each charge process, and the capacitor product with the performance which does not reach the standard can be judged according to conditions, so that the risk that the surge current defective products circulate to a client side is reduced.
Specifically, the number of cycles may be three, five, ten, or the like, and is not particularly limited herein.
S3: and outputting a first screening signal representing screening out of the surge current defective products, and controlling the clamp to screen out the surge current defective products.
In this embodiment, the switching of the circuit is implemented using an IGBT module in the circuit for controlling the application of the surge current to the capacitor product.
The IGBT module is tolerant of high power, enabling high voltage capacitor products to carry out surge current detection.
S4: and (5) continuously charging the surge current good product for a second preset time period, and then disconnecting the circuit to perform a holding voltage test.
Specifically, the control jig conveys the inrush current good product to the first charging area 7 for continuous charging.
The second preset duration may be adjusted according to a performance parameter of the capacitor product.
S5: and the control clamp conveys the surge current good products to the third detection position 8 for carrying out the holding voltage test, and after the holding voltage test is finished, automatic discharging is carried out.
S6: outputting a second screening signal representing screening out the defective products of the holding voltage, and controlling the clamp to screen out the defective products of the holding voltage.
In this embodiment, the control jig conveys the surge current defective products and the holding voltage defective products to the second discharge position 9 for screening.
S7: and charging the good product with the holding voltage.
Specifically, the control jig conveys the finished holding voltage good product to the second charging area 10 for charging.
S8: and carrying out leakage current test on the good products with the maintained voltage, and automatically discharging after the test is completed.
Specifically, the control fixture conveys the good product of the holding voltage to the fourth detection position 11 for leakage current test, and the control fixture conveys the good product of the holding voltage after the test to the discharge region 12 for automatic discharge.
S9: and carrying out capacity, loss, equivalent series resistance and bottom bulge tests on the leakage current good products, and calculating the capacity change rate before and after the surge current test.
Specifically, the control jig conveys the capacitor product with the leakage current test completed to the fifth detection position 13 for capacity, loss, equivalent series resistance and bottom bulge test, and calculates the capacity change rate before and after the surge current test.
S10: and outputting collection signals for collecting the surge current good products, the holding voltage good products, the leakage current good products, the capacity, the loss, the equivalent series resistance, the capacity change rate before and after the surge current test and the bottom convex good products by the characterization, and controlling the clamp to collect.
Specifically, the control jig conveys the surge current yield, the holding voltage yield, the leakage current yield, the capacity, the loss, the equivalent series resistance, the capacity change rate before and after the surge current test, and the bottom convex yield to the yield collection box 14 for collection.
S11: and outputting a fourth screening signal representing the screening of the leakage current, the capacity, the loss, the equivalent series resistance, the capacity change rate before and after the surge current test and the bottom convex defective products, and controlling the clamp to screen the leakage current, the capacity, the loss, the equivalent series resistance, the capacity change rate before and after the surge current test and the bottom convex defective products.
In this embodiment, the control jig conveys the leakage current defective products and capacities, losses, equivalent series resistances, capacity change rates before and after the surge current test, and bottom convex defective products to the third discharge position 15 for screening.
In addition, before carrying out surge current test to the capacitor product, the capacitor product also can carry out capacity and loss test, and the output characterization screens out the fifth screening signal that removes capacity defective products and loss defective products, and control anchor clamps screen out capacity defective products and loss defective products.
In this embodiment, the number of fixtures corresponds to the number of capacitor products, wherein one fixture may or may not hold one capacitor product. In other embodiments, a plurality of capacitor products may be placed on one fixture, which is not particularly limited herein.
The clamp is arranged on the return chain 3 for conveying and moving.
Specifically, the form of the jig is not limited, and the jig may be a clip, a suction nozzle that performs vacuum suction, or the like. In addition, in order to be able to perform an inrush current test on a variety of capacitor products, the form of the clamp may also be changed according to the structure of the capacitor product so that the clamp is adapted thereto.
In this embodiment, the return chain 3 has a square shape, and in other embodiments, the return chain 3 may have other shapes, which are not limited herein.
The capacitor products are conveyed to the return chain 3 through the feeding vibration disc and the flat conveying track 1 to be connected with the clamp.
Specifically, the capacitor products are fed through the feeding tray and are orderly arranged in the horizontal conveying track in a mode that the body faces upwards and the lead wire faces downwards.
More, the capacitor products are subjected to pin separation, positive and negative electrode detection and positive and negative electrode correction in the transition region 2 between the feeding vibration disc, the horizontal conveying track 1 and the return chain 3, so that the positive and negative electrode directions of all the capacitor products are consistent, and meanwhile, the capacity and loss of the capacitor products before surge current test are detected.
In summary, the embodiment of the invention provides a capacitor product surge current performance test method and test equipment, the capacitor product surge current performance test method includes obtaining a current signal and a voltage signal of an oscilloscope monitored capacitor product in a process of applying a surge current, wherein the current signal includes a first signal representing a maximum current and a second signal representing a real-time current after charging for a first preset time period, and the voltage signal includes a third signal representing the maximum voltage; if at least one of the following conditions is not met, judging that the capacitor product is a defective surge current product; if all the following conditions are met, judging the capacitor product as a good surge current product; wherein the conditions include: the maximum current is greater than a preset maximum current; the real-time current is smaller than a preset real-time current; the maximum voltage is greater than a preset maximum voltage. According to the capacitor product surge current performance testing method, capacitor products with unqualified performance can be judged according to judging conditions, the unqualified capacitor products are prevented from flowing out, capacitor products with exceeding performance can be judged and screened out, and the exceeding capacitor products are prevented from flowing out.
The testing equipment is applied to the capacitor product surge current performance testing method, and can be used for carrying out capacitor product surge current performance testing and judging and screening out capacitor products with performance not up to standard, so that the capacitor products not up to standard are prevented from circulating.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The method for testing the surge current performance of the capacitor product is characterized by comprising the following steps of:
obtaining a first signal representative of a maximum current;
acquiring a second signal representing real-time current after charging for a first preset time period;
obtaining a third signal indicative of a maximum voltage;
judging whether the capacitor product is good in surge current or not according to the first signal, the second signal and the third signal;
wherein the first signal, the second signal, and the third signal are signals monitored by an oscilloscope during the application of an inrush current to the capacitor product;
if at least one of the following conditions is not met, judging that the capacitor product is a defective surge current product;
if all the following conditions are met, judging the capacitor product as a good surge current product;
wherein the conditions include:
the maximum current is greater than a preset maximum current;
the real-time current is smaller than a preset real-time current;
the maximum voltage is greater than a preset maximum voltage.
2. The method for testing the surge current performance of a capacitor product according to claim 1, wherein after the step of judging the capacitor product as a defective product of the surge current, the method for testing the surge current performance of the capacitor product further comprises:
outputting a first screening signal representing screening out the surge current defective products;
and the control clamp screens out the surge current defective products.
3. The method of claim 1, wherein the circuit for controlling the application of the inrush current to the capacitor product is implemented as a switch of a circuit using an IGBT module.
4. The method for testing the inrush current performance of a capacitor product of claim 1, further comprising, after the step of determining that the capacitor product is good in inrush current, the step of:
and after the good surge current product is continuously charged for a second preset time period, the circuit is disconnected so as to perform a holding voltage test.
5. The method for testing the surge current performance of a capacitor product according to claim 4, wherein after the step of testing the holding voltage by opening the circuit after the good surge current product is continuously charged for a second preset period of time, the method further comprises:
and the surge current good products are automatically discharged.
6. The method for testing the surge current performance of a capacitor product according to claim 5, wherein after the step of automatically discharging the good surge current product, the method for testing the surge current performance of the capacitor product further comprises:
and charging the surge current good products.
7. The method for testing the inrush current performance of a capacitor product of claim 6, further comprising, after the step of charging the good inrush current product:
and carrying out leakage current test on the surge current good products, and automatically discharging after the test is completed.
8. The method for testing the surge current performance of a capacitor product according to claim 7, wherein after the step of testing the good product for the leakage current, the method for testing the surge current performance of the capacitor product further comprises:
and carrying out capacity, loss, equivalent series resistance and bottom bulge tests on the surge current good products, and calculating the capacity change rate before and after the surge current tests.
9. The method for testing the surge current performance of a capacitor product according to claim 8, wherein after the step of performing the capacity, the loss, the equivalent series resistance and the bottom bump test on the good surge current product and calculating the capacity change rate before and after the surge current test, the method for testing the surge current performance of the capacitor product further comprises:
outputting a collection signal representing collection of the good capacitor products;
and the control clamp collects the good products of the capacitor.
10. A test apparatus, characterized in that the test apparatus is applied to the capacitor product surge current performance test method according to any one of claims 1 to 9;
wherein the test equipment is used for testing the capacitor products with rated voltages of 500V and below.
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| CN212783108U (en) * | 2020-07-28 | 2021-03-23 | 深圳中元电子有限公司 | Online surge detection device of full-automatic high-voltage aging machine |
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2021
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| US4307342A (en) * | 1979-07-16 | 1981-12-22 | Western Electric Co., Inc. | Method and apparatus for testing electronic devices |
| WO1991012094A2 (en) * | 1990-02-13 | 1991-08-22 | Egapro Ag | Process and device for recuperating used batteries |
| CN207457382U (en) * | 2017-11-13 | 2018-06-05 | 深圳市智胜新电子技术有限公司 | Electrolytic capacitor surge test frock |
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